Patents Assigned to Usui Kokusai Sangyo Kabushiki Kaiska
  • Method of treating a cast iron member prior to joining to another member
    Patent number: 4561484
    Abstract: A method of welding, soldering or fusing a cast iron member to another member of cast iron or other metal, wherein the cast iron member is dipped in a hot concentrated aqueous solution of chromic acid, and washed with water before it is joined to the other member.
    Type: Grant
    Filed: November 21, 1983
    Date of Patent: December 31, 1985
    Assignee: Usui Kokusai Sangyo Kabushiki Kaiska
    Inventors: Masayoshi Usui, Osamu Yonemochi